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MAX8834Y

Maxim Integrated Products
Part Number MAX8834Y
Manufacturer Maxim Integrated Products
Description Adaptive Step-Up Converters
Published Jun 26, 2009
Detailed Description 19-4421; Rev 0; 4/09 www.DataSheet4U.com KIT ATION EVALU LE B A IL A AV Adaptive Step-Up Converters with 1.5A Flash Dr...
Datasheet PDF File MAX8834Y PDF File

MAX8834Y
MAX8834Y

Overview
19-4421; Rev 0; 4/09 www.
DataSheet4U.
com KIT ATION EVALU LE B A IL A AV Adaptive Step-Up Converters with 1.
5A Flash Driver General Description Features ♦ 2.
5V to 5.
5V Operation Range ♦ Step-Up DC-DC Converter 1.
5A Guaranteed Output Current Adaptive or I2C Programmable Output Voltage 2MHz and 4MHz Switching Frequency Options ♦ Two Flash/Movie LED Current Regulators I2C Programmable Flash and Movie Current Low-Dropout Voltage (110mV max) at 500mA ♦ LED Indicator Current Regulator I2C Programmable Output Current Ramp and Blink Timers for Indicator Mode Low-Dropout Voltage (130mV max) at 16mA ♦ I2C Programmable Safety and Watchdog Timers ♦ GSM Blank Logic Input ♦ MAXFLASH System Lockup Protection ♦ Remote Temperature Sensor Input ♦ Open/Short LED Detection ♦ Thermal Shutdown Protection ♦ < 1µA Shutdown Current ♦ 20-Bump, 0.
5mm Pitch, 2.
5mm x 2.
0mm WLP MAX8834Y/MAX8834Z The MAX8834Y/MAX8834Z flash drivers integrate a 1.
5A PWM DC-DC step-up converter and three programmable low-side, low-dropout LED current regulators.
The step-up converter features an internal switching MOSFET and synchronous rectifier to improve efficiency and minimize external component count.
An I2C interface provides flexible control of stepup converter output voltage setting, movie/flash mode selection, flash timer duration settings, and current regulator settings.
The MAX8834Y/MAX8834Z operate down to 2.
5V, making them future proof for new battery technologies.
The MAX8834Y/MAX8834Z consist of two current regulators for the flash/movie mode.
Each current regulator can sink 750mA in flash mode and 125mA in movie mode.
The MAX8834Y/MAX8834Z also integrate a 16mA lowcurrent regulator that can be used to indicate camera status.
The indicator current regulator includes programmable ramp and blink timer settings.
A programmable input current limit, invoked using the GSMB control, reduces the total current drawn from the battery during PA transmit events.
This ensures the flash current is set to the ma...


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